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Questions tagged [ultrasonics]

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28 questions
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0 votes
1 answer
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I am using a HC-SR04 ultrasonic sensor to measure the distance using an Arduino Uno. When I run this code which is worked perfectly in the previous, it only shows just random readings in the serial ...
Y_Jay's user avatar
  • 13
0 votes
0 answers
96 views

#include <MIDI.h> int scale = A4; int oct = A2; int potval, octval,octval2=0; int newnote, prevnote = -1; int newpotval,prepotval=-1,potval2=0; int trigr = 7; // Ultrasonic right int echor = ...
DETOX's user avatar
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1 vote
0 answers
242 views

I have an issue using an ultrasonic sensor. The problem is that when I connect the ultrasonic sensor to my Arduino Nano, it always gives some random values, usually 130 cm, I don't know why. I bought ...
hasan darwish's user avatar
  • 11
-1 votes
1 answer
64 views

I use a lot Arduino Uno, but in this case, I have some BQ ZUM BT-328 boards, which are based on Arduino BT. The problem with some of BQ ZUM BT-328 boards is that the ultrasonic sensor (HC-SR04) is not ...
CGG's user avatar
  • 99
0 votes
1 answer
166 views

So I have created a method to read and return Ultrasonic Sensor Data. I have 2 Ultrasonic Sensors. Below is my code.    // Ultrasonic Pins    #define T1 2 &...
Ansari Aquib's user avatar
  • 13
1 vote
1 answer
1k views

I am new to programming so bear with me. I am writing a simple code to control a motor such that the motor will turn at full speed as long as the sensor does not detect an object within 5" of the ...
Pilot Ken's user avatar
  • 19
1 vote
0 answers
96 views

I am trying to use an ultrasonic sensor to stop a tiny voice-controlled car but I can't get it to work. once the motor starts moving it doesn't stop I'm trying to make the car stop moving even though ...
brian's user avatar
  • 11
4 votes
2 answers
1k views

I know the whole controlling a fan with an arduino thing is getting old, but somehow I still don't get it to work. Tried to answer it based on other questions but I am too much of a newbie to ...
crabdance's user avatar
  • 43
1 vote
0 answers
99 views

const int Trigger = 6; const int Echo = 7; const int LEDpin1 = 4; const int LEDpin2 = 5; const int Parameter = 400; float Time; void setup() { Serial.begin(9600); pinMode(Trigger, OUTPUT); pinMode(...
Leonardo Morales's user avatar
  • 11
1 vote
1 answer
112 views

I've written a sketch to drive a differential drive system, specifically - to be able to drive strait. This does work. So I am trying to add the ability to stop when the path is blocked using US ...
יחזקאל הירשהורן's user avatar
  • 31
4 votes
1 answer
227 views

I was simply trying to program a buzzer with the ultrasonic HC SR04 and 128x64 OLED display. The buzzer is an active buzzer (3 pin) on a small board. The problem is that, once on, it never stops ...
Bukaida's user avatar
  • 141
1 vote
2 answers
622 views

How can I measure the distance of an HR-S04 ultrasonic sensor with millis and micros?
alessandromrc's user avatar
  • 145
2 votes
1 answer
572 views

I am making a line follower car that follows the line when push button is pressed. And by using ultrasonic sensor I want the car to stop when object ahead distance is closer than 100 and then make ...
PGI's user avatar
  • 21
1 vote
0 answers
127 views

I am thinking of using an ultrasonic sensor outdoors, and am wondering if the presence of wind (say up to 20km/h) would significantly impact the accuracy of the readings, or would this not be a large ...
Eric's user avatar
  • 41
0 votes
1 answer
107 views

I am trying to make a circuit that will be used for turning on a light whenever there are 1 or more people in a room. I need to add to a variable counter when someone enters and subtract when someone ...
NinePlusTenEqualsTwentyOne's user avatar
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